Quote:
Originally Posted by Don Lindsly
If the oscillator runs on frequency the crystal is OK.
Don
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This is true provided the tube is good. There's a quickie way to tell if the osc. tube might be borderline weak.. After the set's warmed up good and everything's in sync, shut the set off for around 5 - 7 seconds, and back on again. If the color comes on barber-poling and takes a while to lock in, the tube is borderline. And this is with a good crystal.
The same technique can be used to show up a borderline horiz osc tube, horiz output, or vert output tube.